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UNITED STATES PATENT EErcE.

HENRY B. SHERIDAN, OF CLEVELAND, OHIO, AND HERMANN A. GORN, OF NEW YORK,N. Y.

ELECTRIC SAFETY-ELEVATOR.

SPECIFICATION forming part of Letters Patent No. 259,593, dated June 13,1882.

Application filed December 2, 1881. (No model.)

Reference is to be had to the accompanying drawings,formin g part ofthis specification, in which similar letters of reference indicatecorresponding parts in all the figures.

Figure 1, Sheet 1, is a sectional elevation of our improvement, takenthrough the line w x, Fig. 2. Fig. 2, Sheet 1, is a plan view of thesaine, the worm bars and guide bars being shown in section. Fig. 3,Sheet 2, is a sectional elevation taken through the line y y, Fig. 4.Fig. 4, Sheet 2, is a sectional plan View of the same, taken through theline ze, Fig. 3. Fig. 5, Sheet 2, is a sectional plan view of theflanged guide-bar andtheinsulated flan ged conductingbar, and showing aguide-roller and an electric brush and screw-post. Fig. 6, Sheet 2, is aside elevation of the same.

The object of this invention is to promote sccurity in elevators.

The invention consists in the combination,

with the well provided with racksin diagonally- Y opposite corners andthe electric motor, of the car, the vertical shaft provided with wormsF, pinions H, and journaled in bearings in diagonally-opposite corners,thehorivzon tal sh aft, and the gearwheels; also, in the combination,with the car, the electric motor, and the drivinggearing, of the clutch,the operating-levers, and connecting-rods, as hereinafter described.

A represents the well, and B the car, of an elevator. The ear B iscentered in the well A, and caused to move up and down freely by theanged guide-rollers C, which are pivoted to supports attached tothediagonally-opposite corn ers ofthe said car and roll upon the flanges ofthe bars D, secured in the opposite diagonal corners of the well A. Inthe other diagonal corners of the well A are secured racks E, havingscrew or worm teeth formed upon them to receive the threads of theendless screws or worms F, attached to the ends ofthe shafts Gr,

which revolve in bearin gs secured to diagonal- 1y-opposite corners ofthe car B.

To the upper ends of the shafts Gare attached beveled-gear wheels H, theteeth of which mesh into the teeth of the beveled-gear wheels I,attached to the ends of the sh aft J. The shaft J crosses the upper partof the car B diagonally and revolves in bearings attached to the saidcar. Upon the middle part of the shaft J are placed two loosebeveledgear wheels, K, which have clutch-teeth formed upon the innerends of their hubs, and the teeth of which mesh into the teeth cf thebeveled-gear wheel L, attached to the shaft M, carrying the armature N.The armatureN is revolved by the power of the magnets O, engendered byan electric current passing through the said magnets.

Upon the shaft J, between the two loose bevi @led-gear wheels K, isplaced a sliding` clutch, l?. which can be thrown into gear with eitherof the two gear-wheels K, so that the car B can be run up and down bythe continuous revolution of the gear-wheel L. The middle part of theclutch P is grooved to receive the forked end of the upper arm of thethree-armed lever Q. The arms of the lever Q meet at right angles, andthe said lever, at the point of intersection of its arms, is pivoted toa support attached to the car B.

To the ends of the lower or cross arms ofthe lever Q, which are made ofequal length, are attached the upper ends ot' two rods or chains, R, thelower ends of which are attached to the lever S upon the opposite sidesof and equally distant from its fulcrum. The lever S is pivoted to asupport attached to the car B in such a position that the said lever canbe conveniently reached and operated by the attendant. One end of thelever S projects for convenience in operating it to start and stop thecar and reverse the direction of its movement.

The conducting-wires T for the electric currentare connected at one endwith the electric motor M NO in the ordinary manner. The other ends ofthe conducting-wires T are con nectcd with the insulated screw-posts U,attached to diagonally-opposite corners of the top of the car B.

To the screw-postsllare attached the brushes VIs V, which are made in Uform, are attached at their centers to the screw-posts U, and their armsare so bent as to fit and press against the opposite sides of the flangeof the bars W, so as to form a sure electric connection with the saidanged bars as they slide up and down upon the said bars. The flangedbars W are insulated from the anged bars D, and are secured to the saidflanged guide-bars D.

With this construction, the car is raised and lowered by the opera-tionof the worm-gearing, and is also supported by the said'gearing, so thatit cannot fall, but will be held securely in any position in which itmay be when stopped.

Having thus described our invention, We claim as new and desire tosecure by Letters Patent 1,'In an electric elevator, the combination,with the Well A, provided with the racks E in diagonally-oppositecorners, and the electric motorM N 0, of the car B, the vertical shaftsG, provided with Worms E, pinions H, and journaled in bearings indiagonally-opposite corners, the horizontal shaft J, and the gear-wheelsI K L, substantially as and for the purpose set f forth.

2. In an electric elevator, the combination,

with the car B, the electric motor M N 0,and

the drivinggearing K L K, of the clutch P, 1evers Q S, andconnecting-rods B B, substann tially as herein shown and described,whereby

